Mini-Chrom Monochromator Accessories

Interchangeable Slit Sets

A 300 micron pair of slits are included with each Mini-Chrom. Additional slit sets can be purchased to optimize resolution or throughput. Slits are available in 50, 100, 150, 300, 600 and 1000 micron widths, all 4 mm in height.

Changing the slit assemblies in any Mini-Chrom takes only a few seconds and no tools. The slit assembly consists of a precision slit photo etched in a black oxide coated brass disc, a slit spacer, slit cover and two banana plugs. The banana plugs allow the assembly to be easily inserted or removed while assuring alignment of the slit with the monochromator.

Note: Slits should always be changed in pairs.

Aperture Adapters

The Aperture Adapter converts the entrance and/or exit slit ports to accept SMA 905 compatible optical fiber assemblies.

Holmium Oxide Calibration Filter

Comprised of 2.5 mm thick holmium oxide filter glass mounted in a metal holder. A spectral scan showing calibration wavelengths from 350 nm to 800 nm is included. A comparison between the reference scan and the indicated wavelength takes only a few seconds.

Higher Order Blocking Filters

Required to block higher order (λ/2, λ/3, λ/4, etc.) radiation. Higher order blocking filters are Dynasil’s Long Pass Cut-On filters mounted in a ring.

Blocking Filters need to be matched to your specific monochromator. For assistance choosing the correct filter, please contact us to order the correct model for your Mini-Chrom Monochromator and application.

Fiber Optic Cable

The standard fiber optic cable assembly plugs directly into the Mini-Chrom entrance or exit port, functionally replacing the standard air slit assembly. The cable is designed with a number of stacked optical fibers creating a 4 mm tall and 1 mm wide illumination/collection aperture (slit) at the end which connects to the Mini-Chrom. At the opposite end of the fiber cable, the fiber optic bundle terminates in a 2.0 mm diameter circular pattern mounted within either an SMA 905 connector, or a 4.57 mm diameter, 12.7 mm long stainless steel ferrule. The cable is 152 cm long. Optometrics also supplies these fiber optic cable assemblies preconfigured with a precision air slit placed over the illumination/collection aperture enabling higher spectral resolution and light throughput control. Optional aperture sizes are all 4 mm tall and include widths of 100, 150, 300, and 600 microns. Please specify your choice at time of order. For applications below 400 nm, quartz fibers are available as special order items. Custom lengths are also available.